Corey Woodworth wrote:
> 
> I'm making an image with a big HF in the foreground. I want to put grass on
> the HF but only on the flat areas. What is the most conventional way to do
> this? I can make an image that describes which areas should and shouldn't
> have grass by using world forge, but I still wouldn't know how to apply the
> image to a macro for placing grass. Thanks in advance!

The easiest is usually to use 'trace()'.  You can use the returned normal
vector to determine the slope at the position.

Christoph

-- 
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Last updated 13 Aug. 2002 _____./\/^>_*_<^\/\.______

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